[1] From June 15 to August 31, 2018, Choi (together with Everglow members Kim Si-hyeon and Wang Yiren) represented Yuehua Entertainment on reality girl group survival show Produce 48.

The group's debut extended play (EP) Color*Iz was released on October 29, 2018, with "La Vie en Rose" serving as its lead single.

[5] On January 2, 2022, Yena announced the release date and schedule for her debut EP Smiley.

A representative from her agency, Yuehua Entertainment shared: [6] Choi Ye Na had various positions in Iz*One, including lead vocal, lead dancer, and even rapper and continued that as she had prepared for her solo over a long time.

Yena will now be starting her career in earnest as a singer who can show diverse forms of herself